PARQUET-80: upgrade semver plugin version to 0.9.27

To include the fix in:
https://github.com/jeluard/semantic-versioning/pull/39

Author: julien <julien@twitter.com>

Closes #46 from julienledem/upgrade_semver_plugin and squashes the following commits:

30e7247 [julien] upgrade semver plugin version to 0.9.27
PARQUET-75: Fixed string decode performance issue

Switch to using 'UTF8.decode' as opposed to 'new String'

https://issues.apache.org/jira/browse/PARQUET-75

Author: Daniel Weeks <dweeks@netflix.com>

Closes #40 from dcw-netflix/string-decode and squashes the following commits:

2cf53e7 [Daniel Weeks] Fixed string decode performance issue
Merge branch 'master' into skip_reading_row_groups
fix backward compatibility check